The aim of this article is to analyze the composition and meaning of the "Chicago Consensus," published in two medical journals in August 2006. The "Consensus" recommends the use of the nomenclature "Disorders of Sex Development" (DSD) instead of the former classification of the "Intersexual States." Also, it suggests conducts related to diagnostic and intervention in these situations. The analysis points to the appearance of new terminologies, in which a medical specialty (genetics) is emphasized, and to the effort towards a classification progressively based on more "technical" terms and with very complex and specific codes. The "Consensus" reaffirms, thus, the fundamental role played by genetics and molecular biology in the discussion and production of knowledge inside the biologic and medical field of the "sexual determination and differentiation," as well as in research and interventions related to intersexuality. In this context, the emergence of the "sexcode" - a sex "revealed" in the microscopic level of the body - is highlighted.